Motor way



Sept. 22, 1925.

l,554,425 c. P. ELDREDGE MOTOR WAY l Filed June 29, 1922 2 sheets-Shet 2 jy Fa' t HF?? X XXX v I Patented Sept. 22, 1925. l

UNITEDFSTATES;

' CILY E T..ELDBEDGE, OFV'SNTRANCISCOQ CALIIFONI 1 V j 'Mo'ron WAY.

- Application filed June 29,

TO all whom it may concern: I r

Be it known that I, CLYDEVT. ELDREDGE, V a citizen of the United States, and resident of San Francisco, county of San Francisco, State of California, have invented 'a new and useful Motor Way, of which the following is a specification. V v V w The present invention relates to improve-` ment in road beds, and has for its particular object the arrangement of the road 'bed in such amanner that it will accommodate the maximum amount of traffic: At present, heavy slow speed vehicles and light'fast moving vehicles usuallyfollow substantially V the same track `With the' resulting'inconvenience, that very often the lighter vehicles capable' of high speed are' forced to run in the track, of heavy slow moving vehicles with a resulting loss of time. Assuming, for instance, that the traffic over a certain road comprises one heavy truck to ten fast moving automobiles, it will be seen that the r latter are continuously hampered and retarded in their progress by the heavy trucks,

' having to either adjust their speed to that of the trucks or being forced to try in some manner to pass around and to over-take the same. It is proposed to arrange special tracks in the road bed for the slow moving vehicles and other tracks for the fast moving vehicles so that, for instance, all thetraffic moving on the former tracks might be con' find to a speed of say,'te n miles an hour, while the traffic on the other tracks might proceed at a speed of thirty miles per hour. In conjunction with this arrangement it is proposed to provide special means for reinforcing the different tracks in accordance with their needs which allows of a comparatively light structure of the road bed as a whole. It is further proposed in a road bed constructed of concrete or similar material to provide suitable means allowing of expansion and contraction of the upper layer which is particularly subjected to the influence of the changes in temperature.

With these and other objects in view the preferred form of the invention is shown in the accompanying drawing in which Figure (1) represents a top plan view of a road bed; Figure (2) a Vertical cross section through the same; Figure (3) an enlarged Vertical cross section through a portion of the same; Figure a longitudinal cross 1922. seriai 571,502.

slightly modified form and Figure a x top plan View of a single rail. While I` have shown only thepreferred forms of my invention I wishto have it. understood that various; changes `or modifications may be.-made within thesco'pe of the .claims hereto attached without departing :fromthe spirit ofthe invention.

In its preferred form `the roa d b ed may be made of comparatvely thi layen of' road ,bed material. such as-concrete. 'In V the. centerportion of the road bedare pro: vided two tracks v(2) designed for heavy traic These: tracks 'are preferably: rein forced with :suitable T beams ,(3.).;embedded in the road bed with underlying greinforc ing strata 1) of concrete material whichare preferably V shaped in cross section. The concrete and the T beams are connected into one solid unit by means of transverse metal members (6) which latter, again are secured to each other by means of longi tudinal metal rods (7). To further reinforce that portion of the road bed under- 'lying the T beams, I provide a plurality of metal rods (8) underneath the -same'with Connecting members '(9) securing them to v the longitudinal rods (7) previously mentioned. a

The T beams (2) serve not' only thepurpose of reinforcing the. tracks but also of guiding the drivers ofthe vehicles and in case the .reinforcing feature is deemed unnecessary, other suitable guide means may be provided, asfor instance, the longitudinal groove (11) shown in Figure 5.

The tracks for the heavy traflic are preferably disposed on each side'of the center line of the 'road bed so as to form the inner tracks while the-tracks (12) forv the lighter trafiic are provided in parallel relation to the same near the border. The latter tracks are preferably constructed along the same prins 'for repairing purposes, ,have to fall out' of line, I provide a border (17) on each side, whichmay be of still lighter construction.

Concrete' roads are frequently subject to cracking due to expansion and' contraction under the influence of the change in the tem-` perature and I propose to eliminate this To accommodate vehicles that crackng ,by` providing longituclinal; as; well as transverse V shaped groewe.. (1S) pene;-- trating the upper layer of the roadbei to Which usually the influence. of. .the heat.. is. confined. Thes g oves ma lefillwwith'* any suitable yelcling material such as taror the like. The longtudnal grooves may probably be omtted wherevtheT beamssare used since the joint between the concrete and 'the' T bea'ns'i serves su lzstantially the' same purposes whereithe grooves'ane used, trs adv's ableto l 'renforce the .underlying concrete` or other road'bedmaterial'n asin ilar' man- Her: as -here tofore cleser'beol With" reference to the' railsr' a'siS shOW-n at (20 ini Figure' and the Weakness caused by 'the-*transverse groovesvmay be :compensated 'by renforcng membersx (21)` disposeol below the same and laterally arranged; re-inforcng members connected: With the former: by rods 23 7 V "Dhetraeksrare preferably providedwvith antskiddin'g :means suoh as the angular groovee:` (19:)arrangedin parallel relation on ffll'e San-ieu 1-1112. aa roaidldeel of. cornparatfely light;

structure, a track for heavy trafic compris- .ng rals enbedded in theroadbed for guid- ^ng and"rentorcngpurposes, a renforcement: of 'the roadbed underneath each rail,

longitudnal reinforong rods running paralof the, roadbed-z and: bottom: flanges-v buried Within -the zrloaclbed, a' renforcenent of the roalbed underneath each rail,- long'tu dnal renforc'ng': rods: running. parallel: to the rails n the plane thereof, long-tudinal rods underneath the rails a 'andtran sverse rein-force' inga: rode: Connecting: the: longitu'clnal rods underneath the'ra-ls': W'ltha-the roels :disposed in-the'zplane'of the railsw L a 4 ELDREDGE. 

